/// @file
/// @author David Pilger <dpilger26@gmail.com>
/// [GitHub Repository](https://github.com/dpilger26/NumCpp)
/// @version 2.1.0
///
/// @section License
/// Copyright 2020 David Pilger
///
/// Permission is hereby granted, free of charge, to any person obtaining a copy of this
/// software and associated documentation files(the "Software"), to deal in the Software
/// without restriction, including without limitation the rights to use, copy, modify,
/// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
/// permit persons to whom the Software is furnished to do so, subject to the following
/// conditions :
///
/// The above copyright notice and this permission notice shall be included in all copies
/// or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
/// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
/// PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
/// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
/// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
/// DEALINGS IN THE SOFTWARE.
///
/// @section Description
///	Generates a list of centroids givin an input exceedance rate
///

#pragma once

#include "NumCpp/Core/Internal/Error.hpp"
#include "NumCpp/Core/Internal/StaticAsserts.hpp"
#include "NumCpp/Core/Types.hpp"
#include "NumCpp/ImageProcessing/applyThreshold.hpp"
#include "NumCpp/ImageProcessing/centroidClusters.hpp"
#include "NumCpp/ImageProcessing/clusterPixels.hpp"
#include "NumCpp/ImageProcessing/generateThreshold.hpp"
#include "NumCpp/ImageProcessing/windowExceedances.hpp"
#include "NumCpp/NdArray.hpp"

#include <string>
#include <vector>

namespace nc
{
    namespace imageProcessing
    {
        //============================================================================
        // Method Description:
        ///						Generates a list of centroids givin an input exceedance
        ///						rate
        ///
        /// @param				inImageArray
        /// @param				inRate: exceedance rate
        /// @param              inWindowType: (string "pre", or "post" for where to apply the exceedance windowing)
        /// @param				inBorderWidth: border to apply (default 0)
        /// @return
        ///				std::vector<Centroid>
        ///
        template<typename dtype>
        std::vector<Centroid<dtype> > generateCentroids(const NdArray<dtype>& inImageArray, double inRate, const std::string& inWindowType, uint8 inBorderWidth = 0)
        {
            STATIC_ASSERT_ARITHMETIC(dtype);

            uint8 borderWidthPre = 0;
            uint8 borderWidthPost = 0;
            if (inWindowType == "pre")
            {
                borderWidthPre = inBorderWidth;
            }
            else if (inWindowType == "post")
            {
                borderWidthPost = inBorderWidth;
            }
            else
            {
                THROW_INVALID_ARGUMENT_ERROR("input window type options are ['pre', 'post']");
            }

            // generate the threshold
            dtype threshold = generateThreshold(inImageArray, inRate);

            // apply the threshold to get xcds
            NdArray<bool> xcds = applyThreshold(inImageArray, threshold);

            // window around the xcds
            if (borderWidthPre > 0)
            {
                xcds = windowExceedances(xcds, borderWidthPre);
            }

            // cluster the exceedances
            std::vector<Cluster<dtype> > clusters = clusterPixels(inImageArray, xcds, borderWidthPost);

            // centroid the clusters
            return centroidClusters(clusters);
        }
    }  // namespace imageProcessing
}  // namespace nc
